Turritella declivis is a species of sea snail, a marine gastropod mollusk in the family Turritellidae. Description Distribution This marine species occurs off the Agulhas Bank, South Africa. References Adams A. & Reeve L. (1850) Mollusca [in] Adams A. (ed.) The zoology of the voyage of H. M. S. Samarang under the command of Captain Sir Edward Belcher, C. B., F. R. A. S., F. G. S., during the years 1843-1846. Reeve, Benham & Reeve: London. Parts I-III Herbert, D. G. (2013) Turritella declivis Adams & Reeve, in Reeve, 1849 (Mollusca: Gastropoda) – a South African not an Australian species, and a characteristic component of the Agulhas Bank benthos. African Zoology 48(2):412-417 page(s): 412–417 Endemic fauna of South Africa Turritellidae Gastropods described in 1850